WO2013185653A1 - 一种进行多网络联合传输的系统、用户设备及方法 - Google Patents
一种进行多网络联合传输的系统、用户设备及方法 Download PDFInfo
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- WO2013185653A1 WO2013185653A1 PCT/CN2013/078035 CN2013078035W WO2013185653A1 WO 2013185653 A1 WO2013185653 A1 WO 2013185653A1 CN 2013078035 W CN2013078035 W CN 2013078035W WO 2013185653 A1 WO2013185653 A1 WO 2013185653A1
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- network element
- access network
- user data
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- wlan
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/22—Performing reselection for specific purposes for handling the traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/15—Setup of multiple wireless link connections
- H04W76/16—Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/08—Load balancing or load distribution
- H04W28/0846—Load balancing or load distribution between network providers, e.g. operators
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/16—Interfaces between hierarchically similar devices
- H04W92/20—Interfaces between hierarchically similar devices between access points
Definitions
- the present invention relates to a mobile communication system, and in particular, to a system, user equipment and method for performing multi-network joint transmission.
- the Long Term Evolution (LTE) system can support data transmission with a maximum downlink rate of 100 Mbps in a 20 M bandwidth.
- LTE Long Term Evolution Advanced, LTE-A
- data is used.
- the transmission rate will be further increased, even reaching 1Gbps.
- wireless LANs that are currently widely used, especially wireless LANs based on the IEEE 802.11 standard, are already in the home and enterprise. Even the Internet is widely used for hotspot access coverage.
- WiFi Wireless Fidelity
- Wi-Fi Alliance Wi-Fi Alliance
- Some operators and companies have proposed to jointly transmit the WLAN to the existing 3GPP network, that is, use the WLAN network to achieve the load sharing (Offload) and network performance improvement of the existing LTE network.
- Interworking protocols for 3GPP networks and WLAN networks have been developed, as shown in Figure 1, the current Interworking architecture.
- the WLAN network is allowed to use the Authentication Authorization Accounting (AAA) in the LTE network for unified authentication and authorization, and the packet data network gateway in the existing LTE network can be reused as the packet data gateway of the WLAN network, and can also be implemented.
- AAA Authentication Authorization Accounting
- the unified accounting and billing of the two networks has achieved the loose coupling of the two networks.
- the current Interworking is triggered by the User Equipment (UE).
- UE User Equipment
- the network side does not have the active right to control the target network and lose control of the UE accessing the network. This may result in the operator not being able to guide the user. Enter its desired or optimal target network;
- the UE does not know whether the network side (such as LTE network and WLAN network) supports interworking, so the UE may choose to connect to a target network that cannot interwork with the current network;
- the network side such as LTE network and WLAN network
- the terminal In order to realize the joint transmission between 3GPP and WLAN, the terminal needs to open two sets of transceivers at the same time, which will have a great impact on the power consumption of the terminal;
- the embodiments of the present invention provide a system, a user equipment, and a method for performing multi-network joint transmission, so as to overcome the defect that the existing operators have large cost expenditures.
- the system for performing multi-network joint transmission includes: a core network and an access network;
- the access network includes: a third generation partnership project (3GPP) access network element and a wireless local area network (WLAN) access network network element;
- the core network includes a 3GPP core network element;
- the 3GPP access network The network element is connected to the network element of the core network through a network interface, and is connected to the network element of the WLAN access network through a traffic distribution interface.
- the network element of the 3GPP access network is configured to be connected to the user equipment through a 3GPP wireless interface, and is received by the network element.
- the WLAN access network element is configured to be connected to the user equipment by using a WLAN radio interface, where the network element of the 3GPP access network is The user equipment and the downlink user data are transmitted between the user equipments.
- the 3GPP access network network element is configured to: after the downlink user data sent from the core network is offloaded, send at least part of the downlink user data to the WLAN access network element through the offload interface;
- the WLAN access network element is configured to send the downlink user data received from the offload interface to the user equipment.
- the 3GPP access network network element is further configured to send, to the user equipment, part of downlink user data that is not sent to the WLAN access network network element by using the offload interface, by using an interface with the user equipment. .
- the network element of the 3GPP access network is configured to be configured to encapsulate at least part of the downlink user data in the form of an Ethernet transmission protocol or a wireless connection-based transmission protocol, and send the network element to the WLAN access network element through the offload interface.
- the 3GPP access network element is configured to offload the downlink user data at an IP layer, or a packet convergence protocol layer, or a radio link control layer or a medium access control (MAC) layer.
- IP layer or a packet convergence protocol layer, or a radio link control layer or a medium access control (MAC) layer.
- MAC medium access control
- the 3GPP access network network element is set to be any one of a load according to the device, a load of the WLAN access network element, a wireless environment quality of the user equipment, or other pre-configured algorithms.
- the downlink user data is offloaded in any combination.
- the WLAN access network network element is configured to send the received user equipment Sending uplink user data to the 3GPP access network network element;
- the 3GPP access network network element is configured to combine uplink user data sent by the user equipment belonging to the same data source and uplink user data sent by the WLAN access network network element.
- the 3GPP access network element is further configured to transmit control plane signaling directly between the core network element and the user equipment.
- the 3GPP access network element In a Long Term Evolution (LTE) network, the 3GPP access network element is connected to the core network element through an S1 interface; in a Universal Mobile Telecommunications System (UMTS) network, the 3GPP access network element passes through the Iu The port is connected to the core network element.
- LTE Long Term Evolution
- UMTS Universal Mobile Telecommunications System
- the embodiment of the present invention further provides a user equipment, having a wireless local area network (WLAN) access function and at least one third generation partnership project (3GPP) wireless access function, including: a receiving module, a sending module, Shunt module and merge module;
- WLAN wireless local area network
- 3GPP third generation partnership project
- the receiving module is configured to receive downlink user data sent by the 3GPP access network network element through the 3GPP wireless interface, and receive downlink user data sent by the WLAN access network network element by using the WLAN wireless interface;
- the merging module is configured to merge the 3GPP access network element received by the receiving module with downlink user data sent by the WLAN access network element;
- the offloading module is configured to offload uplink user data to be sent
- the sending module is configured to send part of the uplink user data that is distributed by the offloading module to the network element of the 3GPP access network, and send another part of the uplink user data to the network element of the WLAN access network.
- the offloading module is configured to offload the uplink user data at an IP layer, or a packet convergence protocol layer, or a radio link control layer or a medium access control (MAC) layer.
- IP layer or a packet convergence protocol layer, or a radio link control layer or a medium access control (MAC) layer.
- MAC medium access control
- the offloading module is configured to perform offloading of the uplink user data to be sent according to a locally pre-configured offloading policy or a traffic offloading policy configured by the 3GPP access network network element.
- the receiving module is further configured to directly receive the control plane signaling sent by the 3GPP access network network element.
- the embodiment of the present invention further provides a method for performing multi-network joint transmission, which is applied to a core network and an access network side;
- the access network includes: a third generation partnership project (3GPP) access network element and a wireless local area network (WLAN) access network network element;
- the core network includes a 3GPP core network element;
- the method includes:
- the network element of the 3GPP access network is connected to the network element of the core network through a network interface, and is connected to the network element of the WLAN access network through a traffic distribution interface, and is connected to the user equipment through a 3GPP wireless interface; Merging the downlink user data, and offloading part of the downlink user data to the network element of the WLAN access network;
- the WLAN access network element is connected to the user equipment by using a WLAN radio interface; and transmitting uplink user data and downlink user data between the 3GPP access network element and the user equipment.
- the 3GPP access network element After the downlink user data sent from the core network is offloaded, the 3GPP access network element transmits the at least part of the downlink user data to the WLAN access network element through the offload interface;
- the WLAN access network element sends the downlink user data received from the offload interface to the user equipment.
- the method further includes:
- the 3GPP access network network element sends part of the downlink user data that is not sent to the network element of the WLAN access network through the traffic distribution interface, and is sent to the user through an interface with the user equipment. Equipment.
- the 3GPP access network element transmits the at least part of the downlink user data to the WLAN access network element through the offload interface in the form of an Ethernet transmission protocol or a wireless connection-based transmission protocol.
- the 3GPP access network network element performs offloading of the downlink user data at an IP layer, or a packet convergence protocol layer, or a radio link control layer or a medium access control (MAC) layer.
- IP layer or a packet convergence protocol layer
- MAC medium access control
- the 3GPP access network network element may be any one or any combination of the load of the device, the load of the WLAN access network network element, the wireless environment quality of the user equipment, or other pre-configured algorithms.
- the downlink user data is offloaded.
- the WLAN access network network element sends the received uplink user data sent by the user equipment to the 3GPP access network network element;
- the 3GPP access network network element combines uplink user data sent by the user equipment belonging to the same data source and uplink user data sent by the WLAN access network network element.
- the method further includes:
- the 3GPP access network network element directly transmits control plane signaling between the core network element and the user equipment.
- the embodiment of the present invention further provides a method for performing multi-network joint transmission, which is applied to a user equipment side, where the user equipment has a wireless local area network (WLAN) access function and at least one third-generation partnership plan ( 3GPP) wireless access function; the method includes:
- the WLAN radio interface receives downlink user data sent by the WLAN access network network element
- the uplink user data is offloaded at an IP layer, or a packet aggregation protocol layer, or a radio link control layer or a medium access control (MAC) layer.
- IP layer or a packet aggregation protocol layer, or a radio link control layer or a medium access control (MAC) layer.
- MAC medium access control
- the uplink user data to be sent is offloaded according to the local pre-configured traffic off policy or the traffic policy configured by the 3GPP access network network element.
- the method further includes:
- the operator can use the data transmission of the WLAN band offloading frequency band without the license plate to divert the data traffic of the 3GPP access network, reduce the network load, and save the frequency band and cost; the operator can reuse
- the existing WLAN access point network element saves the operation and maintenance expenditure of the network side; at the same time, the data throughput of the UE is increased to meet the requirements of the user's current multimedia service; in addition, the architecture also guarantees the protocol and the terminal device. Maximum compatibility makes the system run more reasonably and efficiently.
- FIG. 1 is a schematic diagram of a related art network interworking protocol architecture
- FIG. 2 is a schematic diagram of a joint transmission architecture between a 3GPP and a WLAN network in the embodiment of the present invention
- FIG. 3(a) to FIG. 3(c) are respectively three types of traffic distribution interfaces between a 3GPP access network and a WLAN access network in an embodiment of the present invention
- FIG. 4(a) and 4(b) are schematic diagrams of data distribution of a 3GPP access network according to an embodiment of the present invention
- FIG. 5 is a schematic structural diagram of a user equipment according to an embodiment of the present invention
- 6 is a schematic diagram of an LTE and WLAN joint transmission network in an application example 1 of the present invention
- FIG. 7 (a) to 7 (c) are schematic diagrams of a traffic distribution interface protocol stack in the application example 1 of the present invention
- FIG. 8 (a ) and 8 ( b ) It is a schematic diagram of a WLAN air interface transmission data protocol stack in the application example 1 of the present invention
- FIG. 9 is a schematic diagram of a transmission scheme of a user equipment and an access network tunnel in the application example 1 of the present invention
- FIG. 10 (a) and 10 (b) are schematic diagrams of a UMTS and WLAN joint transmission network in the application example 2 of the present invention
- 11(a) and 10(b) are schematic diagrams of a WLAN air interface data protocol stack in the second application example of the present invention.
- FIG. 12 is a schematic diagram of a transmission scheme of a user equipment and an access network tunnel in an application example 2 of the present invention.
- a system for jointly transmitting a 3GPP and a WLAN network includes: a core network and an access network, where the access network includes: a 3GPP access network element and a WLAN access network element, and a core
- the network includes core network elements in the 3GPP system.
- the core network element and the network element of the 3GPP access network can be connected through a network interface, for example, through an S1 interface in an LTE network, and through the Iu port in a UMTS (Universal Mobile Telecommunications System) network. Connections; can also be connected via a wired interface (such as fiber optics) or a wireless interface (such as via a microwave or 3GPP air interface based wireless connection).
- the core network element includes: MME (Mobility Management Entity), SGW (Serving Gateway), and PGW (Packet Data Network Gateway). Network gateway), etc.
- MME Mobility Management Entity
- SGW Serving Gateway
- PGW Packet Data Network Gateway
- Network gateway etc.
- the core network element includes: SGSN (Serving GPRS Support Node, GPRS (General Packet Radio Service) Support node) and GGSN (Gateway GPRS Support Node).
- the foregoing 3GPP access network network element may include: an evolved base station (Evolved Node B, hereinafter referred to as eNB), a relay node (Relay node, abbreviated as RN), or a Home Evolved Base Station (Home eNB, referred to as HeNB).
- the UMTS network may include: a radio network controller (Radio Network Controller, RNC for short), a base station (Node B), and a home base station (Home Node B, HNB).
- RNC Radio Network Controller
- the 3GPP access network element has the functions of splitting downlink user data and merging uplink user data belonging to the same data source, in addition to the functions of the existing 3GPP access network element;
- the WLAN access network element includes a WLAN access point (Access Point, referred to as
- AP may also include a WLAN access control network element (Access Control, AC for short).
- WLAN access control network element Access Control, AC for short.
- the function of the WLAN access network element is similar to that of the existing WLAN access network element, and is mainly responsible for the transmission of user data; however, the difference from the existing WLAN access network element is that the WLAN access network element transmits
- the data is the offloaded data that interacts with the network element of the 3GPP access network through the offload interface.
- the shunt interface between the WLAN access network element and the 3GPP access network element is mainly responsible for
- the user data of the split is transmitted between the network element of the 3GPP access network and the network element of the WLAN access network.
- the user data can be transmitted using the Ethernet transport protocol, such as through the IP layer (as shown in Figure 3 (a)) or a higher level transport protocol (such as the Tunneling protocol shown in Figure 3 (b)
- Figure 3 (c) shows the UDP (User Datagram Protocol); if the traffic distribution interface uses a wireless interface, the difference between the transmission and the wired interface is mainly at the bottom layer (ie, L1, L2 layers).
- the transport protocol uses a transport protocol based on a wireless connection.
- the user equipment is a multimode terminal supporting at least WLAN and a 3GPP radio access technology, and respectively performs data transmission with the 3GPP access network element and the WLAN access network element through the 3GPP air interface protocol and the WLAN air interface protocol.
- the 3GPP air interface protocol and the WLAN air interface protocol are consistent with the existing Uu port transmission protocol and the 802.11 protocol, respectively.
- the user data transmitted between the WLAN access network element and the user equipment is, in the downlink direction, the user data transmitted by the 3GPP access network network element to the WLAN access network element; and is generated by the UE in the uplink direction.
- the user data of the WLAN access network is transmitted to the network element of the 3GPP access network through the traffic distribution interface.
- the UE splits the uplink user data according to the traffic distribution policy. After the offloading, the UE sends part of the uplink user data to the 3GPP access network, and sends another part of the uplink user data to the WLAN access network.
- the offloading policy may be pre-configured in the UE, or may be configured by the 3GPP access network element for the UE.
- the splitting of the user data may occur in the IP layer, or the Packet Data Convergence Protocol (PDCP) layer, or the Radio Link Control (RLC) layer, or the medium access. Control (Medium Access Control, MAC for short) layer.
- PDCP Packet Data Convergence Protocol
- RLC Radio Link Control
- Control Medium Access Control, MAC for short
- the user data can be encapsulated in different package formats. If the offloading occurs at the IP layer, the sender transmits different user IP data packets to the receiver through different paths (that is, through 3GPP air interface or WLAN air interface), as shown in Figure 4 (a); if it occurs in the PDCP layer, The user data of the offloaded user is the user data processed by the PDCP layer, as shown in FIG. 4(b); similarly, the same applies to the RLC layer and the MAC layer offload, and details are not described herein again.
- the sender transmits different user IP data packets to the receiver through different paths (that is, through 3GPP air interface or WLAN air interface), as shown in Figure 4 (a); if it occurs in the PDCP layer, The user data of the offloaded user is the user data processed by the PDCP layer, as shown in FIG. 4(b); similarly, the same applies to the RLC layer and the MAC layer offload, and details are not described herein again.
- the sender may also use a logical link control layer (Logic Link Control, referred to as LLC) protocol for encapsulation processing on the 802.11 MAC layer protocol;
- LLC logical Link Control layer
- the receiver will also perform the unpacking process.
- the sender is the 3GPP access network network element, and the receiver is the user equipment;
- the sender is the user equipment, and the receiver is the 3GPP access network network element.
- the 3GPP access network element is the dominant system of the entire system, and the WLAN access network element is only responsible for the transmission of part of the user data. That is to say, which WLAN access network the UE specifically accesses can be controlled or assisted by the 3GPP access network.
- the transceiver on the WLAN side can be controlled by the 3GPP access network, which achieves the purpose of power saving by the UE.
- a user equipment having a wireless local area network (WLAN) access function and at least one third generation partnership project (3GPP) wireless access function, includes: a receiving module 50, The sending module 51, the shunt module 52 and the merging module 53;
- WLAN wireless local area network
- 3GPP third generation partnership project
- the receiving module 50 is configured to receive a 3GPP access network element through a 3GPP radio interface. Downlink user data, and receiving downlink user data sent by the WLAN access network element through the WLAN radio interface;
- the merging module 51 is configured to combine the 3GPP access network element received by the receiving module with the downlink user data sent by the WLAN access network element;
- the offloading module 52 is configured to offload uplink user data to be sent
- the sending module 53 is configured to send part of the uplink user data that is distributed by the offloading module to the network element of the 3GPP access network, and send another part of the uplink user data to the network element of the WLAN access network.
- the offloading module 52 is configured to offload the uplink user data at an IP layer, or a packet convergence protocol layer, or a radio link control layer or a medium access control (MAC) layer.
- IP layer or a packet convergence protocol layer, or a radio link control layer or a medium access control (MAC) layer.
- MAC medium access control
- the offloading module 52 is configured to offload the uplink user data to be sent according to a locally pre-configured offloading policy or a traffic offloading policy configured by the 3GPP access network element.
- the receiving module 50 is further configured to directly receive control plane signaling sent by the 3GPP access network network element.
- a method for performing multi-network joint transmission is applied to a core network and an access network side;
- the access network includes: a third generation partnership project (3GPP) access network element and a wireless local area network (WLAN) access network network element;
- the core network includes a 3GPP core network element;
- the method includes:
- the network element of the 3GPP access network is connected to the network element of the core network through a network interface, and is connected to the network element of the WLAN access network through a traffic distribution interface, and is connected to the user equipment through a 3GPP wireless interface; Merging the downlink user data, and offloading part of the downlink user data to the network element of the WLAN access network;
- the WLAN access network element is connected to the user equipment through a WLAN radio interface; and the uplink user data and the downlink user data are transmitted between the network element of the 3GPP access network and the user equipment.
- the 3GPP access network element After the downlink user data sent from the core network is offloaded, the 3GPP access network element transmits the at least part of the downlink user data to the WLAN access network element through the offload interface;
- the WLAN access network element sends the downlink user data received from the offload interface to the user equipment.
- the method further includes:
- the 3GPP access network network element sends a part of downlink user data that is not sent to the WLAN access network element by using the offload interface, and is sent to the user equipment through an interface with the user equipment.
- the network element of the 3GPP access network sends at least part of the downlink user data to the WLAN access network element through the offload interface in the form of an Ethernet transmission protocol or a wireless connection-based transmission protocol.
- the 3GPP access network network element performs offloading of the downlink user data at an IP layer, or a packet convergence protocol layer, or a radio link control layer or a medium access control (MAC) layer.
- IP layer or a packet convergence protocol layer
- MAC medium access control
- the 3GPP access network network element may be any one or any combination of the load of the device, the load of the WLAN access network network element, the wireless environment quality of the user equipment, or other pre-configured algorithms.
- the downlink user data is offloaded.
- the WLAN access network network element sends the received uplink user data sent by the user equipment to the 3GPP access network network element;
- the 3GPP access network network element combines uplink user data sent by the user equipment belonging to the same data source and uplink user data sent by the WLAN access network network element.
- the method further includes:
- the 3GPP access network network element directly transmits control plane signaling between the core network element and the user equipment.
- a method for performing multi-network joint transmission is applied to a user equipment side, where the user equipment has a wireless local area network (WLAN) access function and at least one third generation partnership project (3GPP) Wireless access function; the method includes:
- the uplink user data is offloaded at an IP layer, or a packet aggregation protocol layer, or a radio link control layer or a medium access control (MAC) layer.
- IP layer or a packet aggregation protocol layer, or a radio link control layer or a medium access control (MAC) layer.
- MAC medium access control
- the uplink user data to be sent is offloaded according to the local pre-configured traffic off policy or the traffic policy configured by the 3GPP access network network element.
- the method further includes:
- Application example 1 Take the joint transmission of LTE and WLAN as an example.
- the eNB is connected to the LTE core network through the S1 interface; on the RAN (Radio Access Network) side, the eNB is also connected to the WLAN AP through the offload interface, where the data under the offload interface is based on Ethernet.
- the protocol performs data exchange; the UE performs data transmission with the eNB and the WLAN AP according to the Uu interface protocol and the WLAN air interface protocol, respectively.
- the eNB and the UE directly interact with each other through the Uu interface, and do not participate in data offloading.
- the eNB For the downlink user data, after the eNB receives the user IP data on the different bearers sent from the core network through the S1 interface, the eNB divides the user data on the different bearers at the IP layer, and the eNB determines that the basis for the offloading may be based on the eNB and/or Or the load of the WLAN AP, or according to the quality of the radio environment in which the UE is located (ie, according to the UE's measurement of the quality of the LTE and WLAN network radio environment), or according to other predetermined algorithms.
- the eNB may also offload the user data in other protocol layers, such as the PDCP layer, the RLC layer, or the MAC layer.
- the data that is offloaded at this time is a protocol data unit (Protocol Data Unit, which is processed by the upper protocol layer.
- PDU Protocol Data Unit
- the user data after the split is a PDCP PDU.
- the eNB After the offloading, the eNB transmits the partial user IP data to the corresponding UE through the Uu interface, that is, the corresponding PDCP, RLC, or MAC layer data encapsulation processing is required, and the specific mechanism is consistent with the existing air interface delivery mechanism, and is not described again.
- the part of the user IP data is transmitted by the eNB to the WLAN AP through the offload interface, and is transmitted by the WLAN AP to the corresponding UE through the WLAN air interface (ie, based on the 802.11 protocol).
- the user data of the offload interface can be transmitted based on the IP data packet, as shown in FIG. 7( a ), where the data is used as an IP packet payload, and the source address and the destination address in the IP header are respectively the sender and the receiver.
- IP address the IP address may be pre-configured, or may be obtained by the sender and the receiver through other processes (such as DHCP (Dynamic Host Configuration Protocol) protocol); or through a tunneling protocol.
- DHCP Dynamic Host Configuration Protocol
- Encapsulation as shown in Figure 7 (b), such as through the GTP (GPRS Tunneling Protocol) protocol (as shown in Figure 7 (c)), where the MAC PDU is used as the GTP packet payload, GTP tunnel transmission.
- the layer address and port number can be pre-configured, or can be obtained through other processes (such as the L3 protocol process) through sending and receiving dual-issue; GRE (Generic Routing) can also be used in the high-level tunnel protocol.
- the user data transmitted through the WLAN air interface may be an IP data packet encapsulated by the WLAN AP, as shown in FIG.
- the offload data (here, the IP packet) directly serves as the new local IP data.
- the payload of the packet, the source address and the destination address of the local IP header are respectively the sender and the receiver IP address, and the IP address may be pre-configured, or may be performed by the sender and the receiver through other processes (such as DHCP protocol). Obtained by negotiation; or other transport protocol data packets, such as multiplexed PDCP and/or RLC and/or MAC layer protocols of LTE, as shown in Figure 8(b), at this time, the WLAN AP pairs the split IP packets according to PDCP accordingly.
- Encapsulation is performed in the form of RLC and MAC, where each protocol layer parameter can be configured by the eNB, and the final protocol PDU is sent as a Payload of the WLAN MAC layer.
- the offloaded user data may be further encapsulated by using an LLC protocol before being sent to the WLAN MAC layer, where the destination service access node and the source service access node field in the LLC packet respectively point to the peer protocol layer of the transceiver party. , Streaming data as the payload of the LLC.
- the above-mentioned shunt interface and the protocol stack of the WLAN air interface can be combined in any combination.
- an end-to-end tunnel can also be established between the UE and the eNB for data transmission, as shown in FIG. 9.
- the tunneling protocol can use existing tunneling technologies, such as IPsec, GTP, or GRE, or other tunneling protocols.
- the traffic distribution interface and the WLAN air interface can also be added with security protection mechanisms according to actual requirements.
- security protection mechanisms for example, through IPSec or other tunnel security mechanisms, the protection implementation method is consistent with the existing security mechanism, and details are not described herein.
- the transmission path of the downlink user data and the interface protocol stack are the same, except that the sender is the UE, and the receiver is the eNB and the WLAN AP. This is not repeated here.
- the above architecture is also applicable to the scenario where the RN and the HeNB are combined.
- the difference is that only the network element of the access network changes, and the backhaul link of the network element is also different.
- the backhaul link of the RN is based on the LTE air interface, and the HeNB
- the backhaul link may also be managed by a home base station gateway, and the like.
- the offload interface protocol and the offload mode between the access network elements are the same.
- Application example 2 Take the joint transmission of the UMTS network and the WLAN network as an example.
- the RNC is connected to the core network through the Iu interface.
- the RNC is also connected to the WLAN AP through the traffic distribution interface.
- the data under the traffic distribution interface is based on the Ethernet protocol for data exchange.
- the interface protocol and the WLAN air interface protocol perform data transmission with the RNC and the WLAN AP.
- the offload interface between the UMTS network and the WLAN AP can also be established between the NodeB and the AP, as shown in Figure 10 (b).
- the control plane signaling transmitted between the access network and the UE is still exchanged between the RNC and the UE through the Uu port, and does not participate in the offload.
- the RNC receives the user IP data of different bearers sent from the core network through the Iu interface, and then offloads the user data on different bearers at the MAC layer.
- the RNC determines that the basis for the offloading may be based on the RNC, the NodeB, and the / or the load of the WLAN AP, or according to the quality of the wireless environment in which the UE is located (ie, according to the UE's measurement of the quality of the UMTS and WLAN network wireless environment), or according to other predetermined algorithms.
- the RNC can also offload user data at other protocol layers, such as the IP layer, the PDCP layer, or the RLC layer. The difference is that the user data after the offloading is the PDU processed by the upper protocol layer.
- the RNC After the offloading, the RNC transmits the partial user IP data to the corresponding UE through the Uu interface, that is, the corresponding PDCP, RLC, or MAC layer data encapsulation processing is required, and the specific mechanism is consistent with the existing air interface delivery mechanism, and is not described again.
- the RNC After the RNC performs the layer 2 protocol, that is, the UMTS PDCP, RLC, or MAC layer encapsulation processing, the RNC transmits the MAC protocol packet to the WLAN AP through the offload interface, and the WLAN AP passes the WLAN air interface (that is, based on the 802.11 protocol). Passed to the corresponding UE.
- the user data of the offload interface can be transmitted based on the IP data packet, as shown in FIG. 6( a ), where the MAC PDU is used as the IP packet payload, and the source address and the destination address in the IP header are respectively the sender and the receiver.
- the IP address of the party may be pre-configured, or may be obtained by the sender and the receiver through other processes (such as DHCP protocol); or encapsulated by a tunneling protocol, as shown in Figure 7 (b)
- the MAC PDU is used as the GTP packet payload, and the transport layer address and port number of the GTP tunnel can be pre-configured.
- Other processes such as the L3 Association
- the high-level tunneling protocol can also use the GRE protocol or the IPsec protocol, or other high-level connection protocol forms.
- the user data transmitted through the WLAN air interface may be the data obtained after the offloading, or may be the IP data packet encapsulated by the WLAN AP, as shown in FIG. 10( a ), where the data is shunted (here, MAC).
- the PDU packet is directly used as the payload of the IP packet.
- the source address and the destination address in the IP header are the addresses of the sender and the receiver IP respectively.
- the IP address can be pre-configured, or the sender and the receiver can pass other
- the process (such as the DHCP protocol) is negotiated; or other transport protocol data packets, such as LLC, as shown in Figure 11 (b), at this time, the destination service access node and the source service access node field in the LLC packet respectively point to the transceiver.
- the MAC layer of both parties, the data is offloaded as the payload of the LLC.
- the above-mentioned shunt interface and the protocol stack of the WLAN air interface can be combined in any combination.
- an end-to-end tunnel can also be established between the UE and the RNC for data transmission, as shown in FIG.
- the tunnel protocol can use IPsec, GTP or GRE, or other tunneling protocols.
- the traffic distribution interface and the WLAN air interface can also be added with security protection mechanisms according to actual requirements.
- security protection mechanisms for example, through IPSec or other tunnel security mechanisms, the protection implementation method is consistent with the existing security mechanism, and will not be described again.
- the transmission path of the downlink user data and the interface protocol stack are the same, except that the sender is the UE, and the receiver is the RNC and the WLAN AP. This is not repeated here.
- the NodeB needs to offload the user data.
- the NodeB determines whether the traffic is based on the NodeB reservation algorithm or the RNC trigger.
- the data offloading method performed on the NodeB and the shunt data transfer mechanism on the offload interface are similar to those of the RNC, and are not described here.
- the above architecture is also applicable to other scenarios such as HNB.
- the difference lies in the change of the network element of the access network.
- the backhaul link of the network element is also different.
- the backhaul link of the HNB may be managed by the home base station gateway.
- the offload interface protocol and the offload mode between the access network and the WLAN AP are the same.
- the operator can utilize the data transmission of the WLAN band offloading frequency band without the license plate, divert the data traffic of the 3GPP access network, reduce the network load, save the frequency band and the cost; the operator can reuse the present Some WLAN access point NEs save network operation and maintenance expenses.
- the data throughput of the UE is increased to meet the user's current multimedia service requirements.
- the architecture also guarantees the maximum protocol and terminal equipment. Compatibility makes the system run more reasonably and efficiently.
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Abstract
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JP2015506090A JP2015519792A (ja) | 2012-07-26 | 2013-06-26 | マルチネットワークジョイント伝送を行うシステム、ユーザ装置及び方法 |
EP13804534.9A EP2811779A4 (en) | 2012-07-26 | 2013-06-26 | SYSTEM, USER DEVICE AND METHOD FOR IMPLEMENTING COMMON MULTI-NETWORK TRANSMISSION |
US14/382,483 US20150139184A1 (en) | 2012-07-26 | 2013-06-26 | System, User Equipment and Method for Implementing Multi-network Joint Transmission |
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CN201210261476.1A CN103582011A (zh) | 2012-07-26 | 2012-07-26 | 一种进行多网络联合传输的系统、用户设备及方法 |
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Also Published As
Publication number | Publication date |
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JP2015519792A (ja) | 2015-07-09 |
EP2811779A4 (en) | 2015-11-11 |
CN103582011A (zh) | 2014-02-12 |
US20150139184A1 (en) | 2015-05-21 |
EP2811779A1 (en) | 2014-12-10 |
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